LU-3500 mdt: use __u64 for sp_cr_flags

LU-3500 mdt: use __u64 for sp_cr_flags

In mdt_reconstruct_open() and mdt_open_by_fid(), when storing a copy
of the sp_cr_flags member of struct md_op_spec on the stack use __u64
rather than __u32. In mdd_create_data() use LPO64 for printing
sp_cr_flags.

Signed-off-by: John L. Hammond <john.hammond@intel.com>
Change-Id: Icaaafe537e9f9dea3934d6c85332d0a355299e25
Reviewed-on: http://review.whamcloud.com/6868
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Fan Yong <fan.yong@intel.com>
Reviewed-by: wangdi <di.wang@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>